Current induction into an antenna?

Click For Summary
SUMMARY

The discussion focuses on calculating the induced current in a wire from radio waves, specifically examining the relationship between electric field strength and output terminal voltage in antennas. It highlights that for ideal dipole or monopole antennas at resonance, the output voltage can be expressed as a function of the incoming electromagnetic signal's electric field strength, measured in Volts/meter. Additionally, the conversion from electric field strength to power in watts is essential for understanding the output voltage of the antenna. The conversation also touches on the educational context, differentiating between high school and college-level physics understanding.

PREREQUISITES
  • Understanding of electromagnetic waves and their properties
  • Familiarity with antenna types, specifically dipole and monopole antennas
  • Knowledge of voltage and power calculations in electrical circuits
  • Basic grasp of Maxwell's equations for advanced discussions
NEXT STEPS
  • Research the calculation of receive voltage for various antenna configurations
  • Learn about the conversion of electric field strength to power in watts
  • Study the principles of electromagnetic theory as outlined in Maxwell's equations
  • Explore practical applications of antennas in radio frequency communication
USEFUL FOR

Physics students, radio engineers, and anyone interested in the principles of antenna design and electromagnetic wave interactions.

Jay_Gridley
Messages
3
Reaction score
0
I am researching radios in physics, and i need to find out what current is induced into a wire depending on its power, i don't know the units for the power of the radio wave.

can someone help me out? thanks.
 
Physics news on Phys.org
I'm a little fuzzy on what you're asking. You can calculate the receive voltage on the antenna terminals based on the field strength of the incoming electromagnetic signal, for various antenna configurations and so on. Like for an ideal dipole or monopole antenna at resonance, you can express the output terminal voltage as a function of the Electric field strength of the incoming EM (in units of Volts/meter). You can convert the electric field strength to a power if you want (in watts), to go from incoming power to the output terminal voltage of the antenna. Is this what you are trying to do, or are you looking at more basic stuff? Is this for high school physics (mostly just forumulas) or for college physics (so you have a background in Maxwell's equations, etc.)?
 

Similar threads

Induction heat flux density induced by wire in a slab
  • · Replies 0 ·
Replies
0
Views
1K
Induced EMF due to a moving magnet
  • · Replies 7 ·
Replies
7
Views
1K
Speed of Current in a coaxial cable
  • · Replies 1 ·
Replies
1
Views
1K
Induced current and force on circular loop in varying magnetic field
  • · Replies 4 ·
Replies
4
Views
1K
Mutual Inductance between a coil and a long straight wire
  • · Replies 6 ·
Replies
6
Views
3K
Making a Shortwave listening antenna
  • · Replies 44 ·
2
Replies
44
Views
9K
Radio Broadcast Antenna Peak Intensity
  • · Replies 7 ·
Replies
7
Views
2K
High School Antenna induction, oscillating circuit generating EM Waves
  • · Replies 6 ·
Replies
6
Views
2K
Current in circular wire surrounding infinite solenoid in a circuit
  • · Replies 7 ·
Replies
7
Views
2K
Lo
  • · Replies 2 ·
Replies
2
Views
1K